/* ===== DevStudio Portfolio — 粒子 · 流光 · 动态 ===== */
:root {
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --accent: #f59e0b;
  --bg: #0f0f1a;
  --bg-card: #1a1a2e;
  --text: #f1f5f9;
  --text-dim: #94a3b8;
  --border: #2d2d4a;
  --radius: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
  overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }

/* ===== 滚动进度条 ===== */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px;
  background: linear-gradient(90deg, #6366f1, #f59e0b, #ec4899);
  z-index: 9999; transition: width 0.1s linear;
}

/* ===== 导航 ===== */
.navbar {
  position: fixed; top: 0; width: 100%; z-index: 1000;
  padding: 16px 0; transition: var(--transition);
}
.navbar.scrolled { background: rgba(15,15,26,0.9); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; }
.logo-icon { color: var(--primary-light); font-size: 24px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { font-size: 14px; color: var(--text-dim); transition: var(--transition); font-weight: 500; }
.nav-links a:hover { color: #fff; }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  justify-content: center; overflow: hidden;
}
#particleCanvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; }
.hero-gradient {
  position: absolute; bottom: 0; width: 100%; height: 200px;
  background: linear-gradient(transparent, var(--bg)); z-index: 1;
}
.hero-content {
  position: relative; z-index: 2; text-align: center;
  max-width: 800px; padding: 0 24px;
}
.hero-badge {
  display: inline-block; padding: 8px 20px; border-radius: 50px;
  background: rgba(99,102,241,0.15); border: 1px solid rgba(99,102,241,0.3);
  font-size: 14px; color: var(--primary-light); margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px); font-weight: 900; margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 50%, #6366f1 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.typewriter { background: none; -webkit-text-fill-color: #fff; }
.cursor {
  display: inline-block; font-weight: 100; color: var(--primary-light);
  animation: blink 1s infinite; -webkit-text-fill-color: var(--primary-light);
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }
.hero-desc {
  font-size: 18px; color: var(--text-dim); margin-bottom: 28px;
}
.hero-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 36px; }
.tag {
  padding: 8px 16px; border-radius: 8px; font-size: 13px;
  background: rgba(255,255,255,0.05); border: 1px solid var(--border);
  color: var(--text-dim); display: flex; align-items: center; gap: 6px;
}
.tag i { color: var(--primary-light); }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-glow {
  position: relative; padding: 14px 36px; border-radius: 50px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6); color: #fff;
  font-size: 16px; font-weight: 700; transition: var(--transition);
  box-shadow: 0 0 30px rgba(99,102,241,0.4); overflow: hidden;
}
.btn-glow::after {
  content: ''; position: absolute; inset: -2px; border-radius: 52px;
  background: linear-gradient(135deg, #6366f1, #f59e0b, #ec4899, #6366f1);
  background-size: 400%; z-index: -1; animation: glow-spin 4s linear infinite;
  opacity: 0; transition: opacity 0.3s;
}
.btn-glow:hover::after { opacity: 1; }
.btn-glow:hover { transform: translateY(-2px); box-shadow: 0 0 50px rgba(99,102,241,0.6); }
@keyframes glow-spin { 0% { background-position: 0% 50%; } 100% { background-position: 400% 50%; } }

.btn-outline {
  padding: 14px 36px; border-radius: 50px; border: 1px solid var(--border);
  font-size: 16px; font-weight: 600; color: var(--text-dim);
  transition: var(--transition);
}
.btn-outline:hover { border-color: var(--primary-light); color: #fff; background: rgba(99,102,241,0.1); }

.hero-scroll { margin-top: 60px; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.hero-scroll span { font-size: 12px; color: var(--text-dim); letter-spacing: 2px; text-transform: uppercase; }
.scroll-mouse {
  width: 24px; height: 38px; border: 2px solid var(--text-dim); border-radius: 12px;
  display: flex; justify-content: center; padding-top: 8px;
}
.scroll-dot {
  width: 4px; height: 8px; border-radius: 2px; background: var(--primary-light);
  animation: scroll-dot 2s infinite;
}
@keyframes scroll-dot { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(12px); opacity: 0; } }

/* ===== Reveal 动画 ===== */
.reveal { opacity: 0; transform: translateY(40px); transition: all 0.8s cubic-bezier(0.4,0,0.2,1); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal:nth-child(1) { transition-delay: 0s; }
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal:nth-child(5) { transition-delay: 0.4s; }

/* ===== Sections ===== */
.section { padding: 100px 0; }
.section-dark { background: #0a0a14; }
.section-light { background: #12121f; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
  display: inline-block; padding: 6px 16px; border-radius: 50px;
  background: rgba(99,102,241,0.1); border: 1px solid rgba(99,102,241,0.2);
  font-size: 12px; color: var(--primary-light); letter-spacing: 2px;
  font-weight: 700; margin-bottom: 16px;
}
.section-header h2 { font-size: 36px; font-weight: 800; margin-bottom: 8px; }
.section-header p { color: var(--text-dim); font-size: 16px; }

/* ===== 服务卡片 ===== */
.services-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}
.service-card {
  position: relative; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px 28px; transition: var(--transition);
  overflow: hidden;
}
.service-card:hover { transform: translateY(-6px); border-color: var(--primary); }
.service-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 30px rgba(245,158,11,0.15);
}
.card-glow {
  position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(99,102,241,0.08) 0%, transparent 60%);
  opacity: 0; transition: opacity 0.3s;
}
.service-card:hover .card-glow { opacity: 1; }
.card-badge {
  position: absolute; top: 16px; right: 16px; padding: 4px 12px;
  border-radius: 50px; background: var(--accent); color: #000;
  font-size: 12px; font-weight: 700;
}
.service-icon-wrap {
  width: 56px; height: 56px; border-radius: 14px; display: flex;
  align-items: center; justify-content: center; font-size: 24px;
  background: rgba(99,102,241,0.1); color: var(--primary-light);
  margin-bottom: 20px;
}
.service-card.featured .service-icon-wrap { background: rgba(245,158,11,0.15); color: var(--accent); }
.service-card h3 { font-size: 20px; margin-bottom: 8px; }
.service-card > p { color: var(--text-dim); font-size: 14px; margin-bottom: 16px; }
.service-features { list-style: none; margin-bottom: 20px; }
.service-features li {
  font-size: 13px; color: var(--text-dim); padding: 4px 0;
  position: relative; padding-left: 20px;
}
.service-features li::before {
  content: '✓'; position: absolute; left: 0; color: #10b981; font-weight: 700;
}
.service-price { font-size: 36px; font-weight: 900; color: var(--primary-light); }
.service-price .currency { font-size: 20px; }
.service-price .period { font-size: 16px; color: var(--text-dim); font-weight: 400; margin-left: 4px; }

/* ===== 数据统计 ===== */
.section-stats {
  position: relative; background: linear-gradient(135deg, #6366f1, #8b5cf6);
  padding: 60px 0; overflow: hidden;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center;
}
.stat-item { position: relative; z-index: 1; }
.stat-icon { font-size: 36px; margin-bottom: 12px; opacity: 0.8; }
.stat-num { font-size: 48px; font-weight: 900; margin-bottom: 4px; }
.stat-label { font-size: 14px; opacity: 0.8; }

@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: 1fr; }
}

/* ===== 项目筛选 ===== */
.project-filters { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.filter-btn {
  padding: 10px 24px; border-radius: 50px; border: 1px solid var(--border);
  background: transparent; color: var(--text-dim); font-size: 14px;
  cursor: pointer; transition: var(--transition); font-family: inherit;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--primary); color: #fff; border-color: var(--primary);
}

/* ===== 项目卡片 ===== */
.projects-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.project-card {
  background: var(--bg-card); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); transition: var(--transition); cursor: pointer;
}
.project-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.project-img {
  height: 140px; display: flex; align-items: center; justify-content: center;
  font-size: 48px;
}
.project-info { padding: 20px; }
.project-cat {
  font-size: 11px; text-transform: uppercase; letter-spacing: 1px;
  color: var(--primary-light); font-weight: 700;
}
.project-card h4 { font-size: 18px; margin: 6px 0; }
.project-card p { font-size: 13px; color: var(--text-dim); margin-bottom: 12px; }
.project-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.project-tags span {
  font-size: 11px; padding: 3px 10px; border-radius: 4px;
  background: rgba(99,102,241,0.1); color: var(--primary-light);
}

/* ===== 3D Tilt ===== */
.tilt { transform-style: preserve-3d; perspective: 1000px; }

/* ===== 技术栈 ===== */
.tech-grid {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 16px;
}
.tech-item {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 20px 28px; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--bg-card); font-size: 28px; color: var(--primary-light);
  transition: var(--transition); min-width: 90px;
}
.tech-item:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: 0 0 20px rgba(99,102,241,0.2); }
.tech-item span { font-size: 12px; color: var(--text-dim); }

/* ===== 流程时间线 ===== */
.process-timeline { position: relative; max-width: 800px; margin: 0 auto; }
.process-line {
  position: absolute; left: 39px; top: 20px; bottom: 20px; width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}
.process-item {
  display: flex; align-items: flex-start; gap: 24px; margin-bottom: 32px;
}
.process-num {
  flex-shrink: 0; width: 80px; height: 80px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 900;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  position: relative; z-index: 1;
}
.process-card {
  flex: 1; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.process-icon { font-size: 24px; color: var(--accent); margin-bottom: 8px; }
.process-card h4 { font-size: 18px; margin-bottom: 4px; }
.process-card p { font-size: 14px; color: var(--text-dim); }

/* ===== 客户评价 ===== */
.testimonials-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; transition: var(--transition);
}
.testimonial-card:hover { border-color: var(--primary); }
.testimonial-stars { font-size: 18px; margin-bottom: 12px; }
.testimonial-card > p { font-size: 15px; color: var(--text-dim); margin-bottom: 16px; line-height: 1.8; }
.testimonial-author strong { display: block; font-size: 14px; }
.testimonial-author span { font-size: 12px; color: var(--text-dim); }

/* ===== 联系 ===== */
.contact-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px; margin-bottom: 32px;
}
.contact-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; text-align: center;
  transition: var(--transition);
}
.contact-card:hover { border-color: var(--primary); transform: translateY(-4px); }
.contact-icon-wrap {
  width: 60px; height: 60px; border-radius: 50%; display: flex;
  align-items: center; justify-content: center; margin: 0 auto 16px;
  background: rgba(99,102,241,0.1); font-size: 24px; color: var(--primary-light);
}
.contact-card h3 { font-size: 20px; margin-bottom: 8px; }
.contact-card p { font-size: 14px; color: var(--text-dim); margin-bottom: 12px; }
.contact-link {
  display: inline-block; padding: 10px 24px; border-radius: 50px;
  background: rgba(99,102,241,0.15); color: var(--primary-light);
  font-weight: 600; font-size: 14px; transition: var(--transition);
}
.contact-link:hover { background: var(--primary); color: #fff; }
.qrcode-img { width: 160px; border-radius: 12px; margin-top: 12px; border: 1px solid var(--border); }
.contact-footer { text-align: center; font-size: 15px; color: var(--text-dim); }

/* ===== 页脚 ===== */
.footer { padding: 32px 0; border-top: 1px solid var(--border); text-align: center; }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.footer-brand { display: flex; align-items: center; gap: 8px; font-size: 18px; font-weight: 700; }
.footer p { font-size: 13px; color: var(--text-dim); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .hero h1 { font-size: 32px; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 12px; }
  .service-card { padding: 24px 20px; }
  .process-num { width: 60px; height: 60px; font-size: 22px; }
  .process-line { left: 29px; }
  .process-item { gap: 16px; }
  .projects-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .section-header h2 { font-size: 28px; }
}